图2. 半定量RT-PCR（A）及Sanger测序（B）检测患者治疗前后骨髓标本CD19 4~8号外显子结果.
1：Nalm6（阳性对照）；2：MV4-11（阴性对照）；3：Pre（BiTE治疗前样本）；4：R（BiTE治疗无效后样本）
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